test(macos): fix mock types and sentinels for CFRunLoop review

Author: ShresthSamyak

tests/test_mpv.py

@@ -999,15 +999,18 @@ def test_macos_wait_for_future(self):
         with mock.patch('threading.current_thread') as mock_current_thread, \
              mock.patch('threading.main_thread') as mock_main_thread, \
              mock.patch('ctypes.cdll.LoadLibrary') as mock_load_library, \
-             mock.patch('ctypes.util.find_library') as mock_find_library:
+             mock.patch('ctypes.util.find_library') as mock_find_library, \
+             mock.patch('ctypes.c_void_p.in_dll') as mock_in_dll:
 
-            # Make sure threading check passes
-            mock_current_thread.return_value = 'main'
-            mock_main_thread.return_value = 'main'
+            sentinel = object()
+            # Make sure threading check passes WITHOUT string interning
+            mock_current_thread.return_value = sentinel
+            mock_main_thread.return_value = sentinel
 
             # Setup CFRunLoopRunInMode mock
             mock_cf = mock.Mock()
             mock_load_library.return_value = mock_cf
+            mock_in_dll.return_value = mock.Mock()
 
             # Reset globals from mpv module to force re-initialization
             mpv._core_foundation = None
@@ -1034,13 +1037,16 @@ def test_macos_wait_for_future_timeout(self):
         with mock.patch('threading.current_thread') as mock_current_thread, \
              mock.patch('threading.main_thread') as mock_main_thread, \
              mock.patch('ctypes.cdll.LoadLibrary') as mock_load_library, \
-             mock.patch('ctypes.util.find_library') as mock_find_library:
+             mock.patch('ctypes.util.find_library') as mock_find_library, \
+             mock.patch('ctypes.c_void_p.in_dll') as mock_in_dll:
 
-            mock_current_thread.return_value = 'main'
-            mock_main_thread.return_value = 'main'
+            sentinel = object()
+            mock_current_thread.return_value = sentinel
+            mock_main_thread.return_value = sentinel
 
             mock_cf = mock.Mock()
             mock_load_library.return_value = mock_cf
+            mock_in_dll.return_value = mock.Mock()
 
             mpv._core_foundation = None
             mpv._cf_runloop_default_mode = None